Feeding mechanism for sewing-machines.



UN`0.7 33,922 '4 FATENTED .JULY 14, 1903.

W. H. sTbMAN. I PEBDING MECHANISM PoR SEWING4 MACHINES.'

APPLICATION FILED 00T. 21. 1902.

- constructed and assembled driving mechanother types ofsewing-machines.

.ing drawings, fforlnin'g apartlof this specifiwellknown type oi." machines commonly desva front elevation of'a machine with the pres- 'of 'assemliling and disasseni'hling the parts.

Ivo. V733,922.

Patented July 14. L903.

` UNITED; STATES "PATENT OFFICE WILLIAM I-Ls'rsnI/IAN, on HARTFORD',- CoNNECTIcUT',Assieme 'rorn11:-^

IoRA'rI'oN or CONNECTICUT.

I FEEDINd MECHANISM F SPECIFICATION forming part of :einem Appleman and ombrzl, 1902. emu so; 12min. ismael.)

15e it known that I,WII,II1AMII. S'IjEDMAN,a citizen of the United States, residing. in the city and county of Hartford, State 4of lConnecticut, have invented a certain new and useful Feeding Mechanism for Sewing-Machinos; andi do hereby declare the following to be a f ull, clear, andexact description of the same, reference vbeing had to the accompany-V cation, and to thegnreslof reference marked thereon. f

This invention relates t'o the feeding mech-- anism of sewing-machines, in'cludilfig'fv devices.

tion being to improve the general construction and operation of these portions of the machine.

The invention consisls'fin the provision of :L positively-drivenfour-motion feed and an edge controller and in certain' peculiarly ism for the said feed and edge controller, all as hereinafter fully described.

rlhe improvements constituting the present invention are shown .in 'connection With'a iggnated i Merrow` yhigh -specd overseaming-v inachinesg but the said improvements are aisoapplicnhle to and' adapted for' use with in the accom panyingdrawings, Figure l is eut improvements applied ',thereto, but with portions of lthe machine mechanismremoved; lfig.l 2 fis-aireinhelevation;ofthe said ma chine .and`fimprovemenis as viewed from the frame ljeing broken away.;l`fig. 3 is afdetail partly in cross-section, taken. onfthe line 3 I5 of Fig. and illustrates also ,the manner Fig.` l'is an' clevetionlofthe feed-carrier and adJacentelemenis detachedrom thefvmachine and with a portion broken, away. If`ig. 5 is controlling mechanism.' Fig. i is a view,l partly inplan 'and partlyin section, showing Patent No.v 733,922, merely 14, IeoeL eccentric'.y .l I VLilie refei-oncenumerals throughout the several-figures of the drawings denotethe same'parts. V The number IOindicates they main Aframeef the machine; '11, a head formed on ai' rame 1 1?, 'secured to the saidmain frame. 12 indicates the mainordrvinizshaft; 1 3,tl1e driving'fpnl'le'li, an auxiliary shaftabove "and paiallelwith the mainshaft; 13 142, ca'm' cylinders located, respectively, on v'theshafui 12 and Hand having intermeshing-gears 12( "14, whereby the ,shafts and camcyliiideis are caneedV to rotate in unison, 'a'ndletf denotes aneccentric-pin located in the endfof the-'shaft 114; l`he.pin'14 (throughmech# ani'sm'not shown) actuatesjiheneedle'of thex machine,r and theA cam-cylinders' 12j 1'4" (als'o through mechanism Vnot shownyactuatethe cooperate with the said needle; buta's'the' stitch-forming mechanism is' well knownfar'id forms no part of this invention an illustration and detailed'descriptiori thereof 'aredeemed unnecessary. 1 1

The number lindic'ates the needle-plate,

frame lll vor in any 'other suitablfmaiiner, andv -16 indicates the Apresser- .foot, supported 'by the said head and', as usual, provided "with prope'rliftingmechanism. f vt' .The feed-'carrier 417 -andj the edge-controller carrier 18,'forming'pat of tlieprese'nt :invenand attheir forwardends, respectively, have. adj ustably secured thereto by -screeis "l'f- 18' At .their-frearfends the-carriers 1.7 1-8 'are p'v'- .oiallysupported on apin 19,- mounted 4in- `the 4tion-.ot ,the machinef The carriers 1718 are adaptedto rock on the pin.` 19in makingfthe Vusual vertical reciprocations, and the .carrier` ,17 is also .1 UJQved `.longitudinelly v.ivitlr refer# ence to thesaidl pin .to eiect `the usual hori' the relativo positie" of lthe/.feed and edge zontal reciprocations of, the feed. .Thefeede 'stitch forming implements or' loopersl 'that headframe 11 or on other suitable fire'd -por'- 95 vMERROW MACHINE COMPANY, OF .Iii/SIR'IFQRD,'CONlllECfllCUfl, i

controller carriers land also the means where1 by lthesaid carriersare actuated. Fig. 'Us

o i supported beneath the-head 1l onthef'headv tion, are located side by side in the-machine the feed-dog 17 andthe edgefcontrollefilii; .L

4 of the material atits edge.

carrier 17 preferably does not engage the pin 19 directly; but the latter is provided with a pivotal block 19, entering an elongated open'- iug 17b at the rear end ofthe carrier and forminga support on which the carrier is adapted dog to force the said material against theunder sideof the presser-foot, thereby retarding and controlling the feeding action of the dog and preventingr the stretching or pouting To properly perform their respective functions, the feed-dog and edge-controller and their carriers 17 18 are raised and lowered simultaneously by an eccentric 12, formed on or secured to the shaft12, which eccentric also forms thesup port for the forward endsof thecarriers. The' eccentric 12c is adapted to rotate within a block 20, common o both carriers and working in bearings 17 1Sc in the said carriers. Upon the rotation of the eccentric the block 2() is actuated to raise and Alower the said carriere, the opening in the saidecarriers being of suitable length to permit the block 20 to slide therein and to permit of the longitudinal movement of the feed-carrier. "For convenience in constructing and assembling the parts the elongated opening or bearing 17 of the feed-carrier 17 is provided with a separable cap 17e and, further, with an opening or slot 17", through which the screw-18', securingthe edge-controller to its carrier 18, may he readily reached and manipulated. Y,

The horizontal movements of the feed are eected by an eccentric 21, secured -to the shaft 12 in"a manner to be hereinafter explained.l The .eccentric 21 is encircled by a strap 22liaving a rearwardly-extending portion pivotally connected with the carrier 17V by the bolt 17, as shown in Figs. l2VV and 6. Upon the rotation ofthe eccentric 21 the carrier 17, through the strap 22, is reciprocated horizontally, the said carrier sliding freely on the blocks 2O 19". v

It will now be obvious that upon the retation .of the shaft 12 the eccentric 12c imparts positive and simultaneous vertical reciprocatqthe carriers 17 184, and therefore to the feed-dog a'nd edge-controller, also that the eccentric2l imparts positive horizontal motions to the said feed-carrier and its dog.

In connection with the shaft 12, the eccentric 21', and the strap 22 means are provided whereby the assembling and dssembling of these elements may be rapidly and easily accomplished. To carry into effect this feature of the invention, the end of the shaft 12 is preferably provided witha threaded extension 12d, upon which the eccentric -21 is mounted, the latter being drilled and tapped to receive the threaded portionof the shaft.` The eccentric 21 is ofsomewhat greater thickness than the eccentric-strap 22 and when in position projects beyond the said strap,

as seen in Figs. 1, 3, and 6. A vgroove or channel 21a is formed in its outer face, while the eccentric-strap 22 at its end encircling the eccentric is provided with diametricallyopposed retaining-shoulders, which in thisA i instance are formed by notches, asshown The numeral 23 indicates what maybe termed a key,'" constructed, preferably, of

thin sheet metal having one edge cut out to form the recess 23a and projections 23".

Should/ itpedesired to remove the eccentric 4 412d for the purpose ofA substituting one of different throw tol vary the length of feed-or for.

other reasons, the said eccentric is rotated to bring its channel 21 into alinement withthe notches 22, as shown in Fig. 2. is then placed in position with its edge 23? in the channel ,21? andthe projections 23 in the 'lhe key 23 notches 23, The eccentric 21 is tlrerehy held y against rotation in the strap 22 and upon the proper rotation of the shaft 12 is caused to travel outward on the threaded portion of the latter until it becomes separated therefrom. On the other hand; should it he desred 'to'place the eccentric in position on the shaft it is inserted in the eccentric-strap, the key is placed in position .to engage the channel and the notches, as before explained, and

pressed against the eccentric to hold thelat-4 Ico'.

IIO

the machine, each 'of which eccentricsis drilled and tapped parallel with its axial center to tit the threaded end 12d of the shaft12,the

screw up to substantially a common relative position upon the shaft, so that the feed shall l l* 4be properly timed. The differentiation in the throw of the eccentrics is determinedy by the izo distance between the. center of frhedrilled" and tapped hole and the'respective centers of the eccentricsj; furtherrthe said eccentrics4 are all of a uniform and suitable diameter to tit and run in the strap 22.. .Y

The described menta of secu'fi'ngthe eti' centrics 21 to the shaft12's'of greatutility in that the eccentrics may be placedyin and removed. from their operative position by the application of a suitable 'instrument' tothe outer or exposed face of the eccentric, and inv removing an eccentric from' itsA operative vposition the application of forcel'to its opposite or inner face to 'start:.it from'tits seatis Vuny1.15 several eccentrics being properly threaded to lnecessary, which featureisparticulary usewith the carrier to impart horizontal reciprofnl, as the opposite or inner` face is inaccessication to the feed substantially as described.

ble in the machine shown. 5. A sewing-machine feeding mechanism 5o Bythe construction illustrated and deembodying a vertically-oscillating and horiscribed the feed --eccentric can readily be zontally-movable carrier, a drive-shaft havplacedin operative position, is firmly and subing a threadedgportion, an eccentric mounted `stantially held while in use, and at theA same on the said threaded portion and connections :time is easily removable between the same and carrier to impart hori- -55 QHavingthus described my invention, what zontal reciprocatio'n to-thevfe'ed, and means m' l claim as'new,`and desire to secure by Letters for locking the said eccentric against rota.- Patent,is'y l' tion with its shaft for facilitating the appli- A1. A sewing-machinel feeding mechanism cation-and removal of lsaid eccentric, subembodying anoscillating and horizontallystantially as described. 6o

, movable feed-dog carrier, an edgecontroller,` ,6. A sewing-machine feeding mechanism t5 anv oscillating carrier therefor, a fixed pivotal embodying a vertically-oscillating and hori` support common to the rear ends of both carzontally-movable Afeed-dog carrier, a shaft.

riers 'and with reference .to which the feedhavingla'threaded portion, an eccentric havdogcarrierislongitudinallymovable and the ing a channeled face and adapted to be 6,5

edge-controllerhasoscillatory movementonly mounted on the threaded shaft portion, an zo means for oscillating both carriers and means eccentric-strap conhecting the eccentric and for moving the feed-dog carrier longtudithe carrier and having diametrically-opposed nally, substantially as described. f y notches adapted to aline withy the channel in 2. A sewing-machine feeding mechanism the eccentric, in combination with asecuring 7c4 embodying an oscillating and, horizontallyimplement adapted to engage the said chan- ',25 movable feed-dog carrier, ablock upon which nel and notches for locking the eccentric the end ofthe said carrier is slidably mountagainst rotation in the strap, substantially ed, an edge-controller, an o'scillatingf carrier as described, A l p therefor, a fixed pivotal support common to 7. A sewing-machine feeding mechanism "15 the said blockand thel rear end of the edgeembodying a vertically-oscillating and horigo controller carrier means for oscillating both Yzontally-movable feed-dog carrier, a drivecarriers and meansrfor moving the feed-dog 'shaft therefor having a threaded portion, an eargre longitudinally; substantially as deeccentric having a face channeled for the re-l, -'scri`e.

AseWing-machinefeeding mechanism ed to be mounted on the threaded portionof embodying a feed-dog carrier and means fo'r the shaft, an eccentric-strap connecting the m'oving the same vertically, an eccentric for eccentric and carrier and havn'gdi'ametric.- driving said feed-dog carrier longitudinally, ally-opposed notches adapted to aline with a main shaft, said eccentric and shaft being the channel in the eccentric, a key forming 85 joined togeach other by a threaded porti'on of a securing implement and having a recessed i 4o one screwing to a threaded portion ot the portion to engage the channel and projectother, whereby eccentrica may be substituted ing portions to engage the notches for lockto vary the feed; substantially as described. ing the eccentric against rotation in the strap,

4. A' sewing-machine feeding mechanism substantially as described.

WILLIAM H. STEDMAN.

embodying a vertically-oscillating and hori-l 45 zontally-movable carrier, a drive-shaft hav- VWitnessesz v @ing a threaded portion, an eccentric mounted NQ A.,W. STEWART,

r .f on the sa'idl threaded portion and connected ALONZO W. LUTHER.

ception of a securing implementand adapt- 8c., 

